Here is a very large forest of spiky crystals of shimmering calcite that formed a cast over the original, underlying scalenohedrons of calcite. If you flip the specimens over, you see that the bottom and sides are also covered with these crystals - it is hollow through the center, with crystals spiking out all around it. On the surface of the cream-colored calcite are tiny spheres of pyrite. This is a very unusual, large and pretty specimen from Romania. Ex. Dave Stoudt Collection.